Mine did the same with flex daily, wants to water all zones for the same amount of time on day 1. On follow-up days however not all zones are being watered. My “some shade” zones look like they’ll get watered 1-2 days after the full sun zones, allowing more time for the moisture to drain/evap out of the zone as they get less sun.
edit
It is also what prompted me to post this suggestion.
